diff --git a/mp_api/client/core/client.py b/mp_api/client/core/client.py
index 5a22fd62..5f1cc047 100644
--- a/mp_api/client/core/client.py
+++ b/mp_api/client/core/client.py
@@ -74,7 +74,7 @@ def __init__(
         headers: dict = None,
         mute_progress_bars: bool = settings.MUTE_PROGRESS_BARS,
     ):
-        """Initialise the REST API helper class.
+        """Initialize the REST API helper class.
 
         Arguments:
             api_key: A String API key for accessing the MaterialsProject